What is obtained when benzene reacts with fuming nitric acid?

The product obtained in the reaction of benzene with chlorine in the presence of ultraviolet light is ...... .

Which of the following compounds has two different $C-C$ bond lengths?

The reaction of benzene with $CH_2Cl_2$ in the presence of $AlCl_3$ gives product $A$. Identify $A$.

Nitrobenzene can be prepared from benzene by using a mixture of conc. $HNO_3$ and conc. $H_2SO_4$. In the mixture,nitric acid acts as a/an

Which of the following will show aromatic behaviour?